package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    UserMapper userMapper;
    @Autowired
    WeChatProperties weChatProperties;
    @Override
    public User vxlogin(UserLoginDTO dto) {
        String openid = getOpenid(dto);
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        QueryWrapper<User> queryWrapper=new QueryWrapper<>();
        queryWrapper.eq("openid",openid);
        User user = userMapper.selectOne(queryWrapper);
        if(user==null){
            user = User.builder().
                    openid(openid).
                    createTime(LocalDateTime.now()).
                    build();
            userMapper.insert(user);//因为这里没有用return，所有不能new user，以防返回的user为null
        }
        return user;
    }

    private String getOpenid(UserLoginDTO dto) {
        Map<String,String>map=new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", dto.getCode());
        map.put("grant_type","authorization_code");
        String s = HttpClientUtil.doGet("https://api.weixin.qq.com/sns/jscode2session",map );
        JSONObject jsonObject= JSON.parseObject(s);
        String openid = jsonObject.getString("openid");
        return openid;
    }


}
